47

Setting this option forces Android to stop each process as soon as it is empty (that is, when no services are started and no activities are on screen for that app). To be clear: this option won't stop apps that would normally run in the background from doing so. Your mail client will still run periodically to check mail, if it's configured to do that. Apps ...


46

A behavour as described above in most cases indicates something's messed up in the system. The most likely candidates here are: Application Cache Dalvik Cache As you might have guessed already, different solutions are available for rooted devices -- but only few for non-rooted devices, which cannot directly access the Dalvik Cache. So read on below ...


8

I recently found that same setting (i.e., number of processes allowed to run in background), and I reduced that setting on my GT-S7562L from "Standard Limit" to only 1. I immediately saw a significant improvement in performance, and so far there have been no problems. I made the change out of desperation - my phone had nearly morphed into a brick. It was ...


7

Yes you're correct. Android will use CPU frequency as required including deep sleep to highest CPU frequency. If Android uses 1.2Ghz for high end task it will consume more battery but on the other hand will finish the task quicker than 1Ghz. Many custom ROM also allows you to change this CPU scaling behavior by changing the governor. For eg: if you choose ...


7

This looks like it could be an issue with certain background services malfunctioning. Try observing the background services and disable some of them to see if you might hit the culprit. To do it in a way that is less hit and miss, there are several battery app in the market or you can use ICS native battery monitor to see if there are anything that are ...


7

Android supports fstrim but it only works if the phone is idle for a long time while charging It's not so. On newer versions, Android runs fstrim with a daily schedule, provided that the conditions meet. Or it should run on a reboot if not run for 3+ days. See this answer for details and how you can run fstrim manually. FRAGMENTATION ON FLASH MEMORY: I ...


6

Uhhhh, that is not a virus! Who told you that? :) kworker is part of the Linux Kernel's scheduler in which it manages the processes running and switching to it a la multitasking. That is normal behaviour of the kernel! It exists on the desktop linux also, see this example to illustrate: ps -elf | grep kworker 1 S root 5 2 0 60 -20 - 0 ...


6

You could try to use some live monitoring app, e.g. OS Monitor. These usually offer you a view on apps currently consuming most of the ressources, e.g. hogging your CPU, eating your RAM, or utilizing your network: OS Monitor showing running processes, and showing network connections (click images for larger variants) Running processes can be sorted by ...


6

"Project Butter" is Google's name for the UI latency enhancements implemented in Android 4.1 Jelly Bean. Any Android device running Android 4.1 or later will have those enhancements. Remember, though, that software is only part of what makes an interface smooth and 4.1 isn't a cure-all for lag. Slow hardware will result in a slow UI regardless of the OS. ...


6

All antivirus applications on all platforms will impact the performance of the device. This is because they intercept your actions and check them for unwanted effects. You say you have installed anti-viruses - plural. If you install more than one such application on any device they will start to check upon each other. This will have a significant ...


6

Performance has nothing to do with battery voltage. The reason is that the flash memory is "worn" and therefore slower and less responsive. My Nexus 7 (1st generation) is also very slow now and I have almost no apps on it. You can read more here: Why Android Phones Slow Down Over Time, part "No Solid-State Drive TRIM" No Solid-State Drive TRIM The ...


5

Try InstaCamera Pro from Google Play Store. It starts very fast and has preferences to start camera and takes photo just by a single touch from home screen of your phone: InstaCamera is the quickest way to take a photo with your phone. There's no long process: just press the widget and it takes a photo, then closes just as quickly. The paid PRO ...


5

The Watchdog Task Manager app is really great for these kinds of problems.


5

There is an article that discusses the semi-technical reasons/issues that have lead to the differences in smoothness of Android and iPhone devices. But after gathering some key points from the article one can conclude: From the very start, IOS had been built around a multi-touch screen (meaning IOS had been built from the gound up to be very responsive ...


5

Assuming your lag is not caused by resource hogging malware (detection and removal covered in malware tag), possible causes (discounting infamous touchwiz :), could be CPU loading Disk I/O Network I/O RAM ( ignoring this going further given 3 GB RAM of your device ) Two apps would greatly help you in identifying the culprit system / downloaded apps ...


4

There are a bunch of Tutorials around on the net on how to increase performance of your Android device (e.g. on LifeHackers here and here). One thing to definitely keep your fingers AWAY from are so-called "boosters" and (automated) Task-Killers. As rm-vanda already stated, they make things only worse; tasks should only be killed if they misbehave (e.g. are ...


4

I share my experience and knowledge as an android developer: Most widgets don't consume (or use just a bit) processor power when they are not visible, but some would consume even if your screen is off and phone is locked. It is based on what task the widget is considered to do, and how developer has written and optimized the code. As a general rule: more ...


4

I've come up with one potential answer myself: TRIM Solid state disks (SSDs) and some flash memory require the operating system to perform a kind of housekeeping task to maintain the efficiency of the device. The operating system command TRIM is explained in this AnandTech article: http://www.anandtech.com/show/2738/10 Its applicability to certain ...


4

GameCIH (CheatIng Hacker) can change the game speed.


4

You are absolutely correct in stating that the bottleneck is actually not the encryption/decryption but NAND write rate. In fact, the performance observed for read/write of encrypted v/s non-encrypted does not vary significantly owing to high cpu speeds. What you might look at though is the rate at which block level encryption happens for the first time. ...


4

This is likely to be caused by one (or both) of two things. 1: Your phone does not have TRIM support - something that was only recently added in 4.3. This makes some devices slow down significantly over time - notably the 2012 Nexus 7 - and they stay slow even after a factory reset. 2: Aging flash. Depending on the quality, type and age of your device's ...


4

I understand that read/write speeds are dependent on what the phone is, and what the SD card is, but since both are flash memory, I thought the read/write times would pretty much be around the same. That is a wrong assumption. While they're all flash technology, there's a very wide certain in the speed of the storage. A Class 2 SD Card has a minimum read/...


4

Simple answer: Yes, but it's usually not noticeable and won't impact a device's ability to function as expected during it's lifetime. Full Explanation: Apps CAN leave traces of information behind when uninstalled. These are usually empty folder and misc. log files, but can also include files created by the application but are assumed that the user would ...


4

Because the devices that have hanging problems are not the ones with better processors and more RAM. Unlike iPhone, where there's only the expensive devices, Android runs on a whole range of devices. At one end, there are the flagships from the big manufacturers, which have a lot of effort put into them to make sure the animations are silky smooth and there ...


4

From the Android developer site: If an activity has lost focus but is still visible (that is, a new non-full-sized or transparent activity has focus on top of your activity), it is paused. A paused activity is completely alive (it maintains all state and member information and remains attached to the window manager), but can be killed by the system in ...


4

Is there any way of activating all cores? You can't. The hardware is not designed to have all 8 cores active. The reason for this is that this Octacore CPU is actually based on big.LITTLE technology, where there are two sets of four cores: a powerful big cores used for heavy processing (e.g. gaming) and energy efficient LITTLE cores used for low load ...


3

My HTC One V was getting so slow that I was getting ready to smash it. After trying everything with nothing working, I went through my apps and deleted a few. Apparently the one causing all the trouble was You Don't Know Jack. The second it was off my phone my speed dramatically increased and started functioning normally again. Not sure if this will help ...


3

I've had a similar issue with my new mobile, Razr Maxx running ICS. It turned out to be an overzealous car HUD application that consumed CPU cycles even when not running. Uninstalling it solved the problem. What confused me initially was that Android OS was shown as the main battery drainer and not the app itself. Since you had the same issue with your ...


3

You might be able to get some of what you want from Carat. This app is a project from UC-Berkeley to measure what's using your battery and how your battery life compares to other people's devices. It doesn't directly measure CPU, but your resource hogs are going to use more battery by implication. From the description: Carat will tell you which apps it ...


3

Even if it might only cover a part of your question: Don't let you scare by those "virus" marketing bluff. There is no such thing as a virus on Android, and hardly will be. Sure some companies want to sell you their "anti virus product". But if you take a deeper look at what it really does (apart from the marketing buzzwords), none of them seems to really ...


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